#!/usr/bin/env python
# Copyright 2023 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################
RAN_ONCE = False

def do_something(data):
    global RAN_ONCE
    if not RAN_ONCE:
        RAN_ONCE = True
    if not data:
        return
    if data[0]:
        print('hello')
    else:
        print('bye')
